Provided is a device for generating data on a clear aligner, which is equipped with a module for generating the data on the clear aligner, which generates 3D data relating to the clear aligner, the module including a first module that receives data on a current dental state from a scanning apparatus that scans patients teeth a second module that generates 3D data on a state of the patients teeth and of the vicinity of the patients teeth based on data that results from the scanning a third module that generates data relating to a 3D clear aligner with a predetermined thickness and a fourth module that processes the data relating to the 3D clear aligner in such a manner that at least one of a shape and a feature of the 3D clear aligner is changed.
